Poland immigrated to Britain.

During World War II, Poland was driven out of its country by Germany, so it had to take a fence-riding policy. As a foreign population, it is difficult to enjoy the same treatment as its own citizens, so life is very bleak. It was not until the end of World War II that the territory of Poland became complete and people could return to their own country.

German bombers roared to Poland, targeting Polish troops, arsenals, airports, railways, roads and bridges. A few minutes later, Poles tasted the biggest sudden death and destruction in human history for the first time from the air. Tens of thousands of cannons were fired at the border, and shells rained down on the positions of the Polish army. After about 1 hour, the German ground forces launched an all-out attack from the north, west and southwest. The first battle after the outbreak of World War II ended in only one month.

After Poland's national subjugation, the army troops not only surrendered and were captured by the Soviet Union, but also broke through to countries such as Northern Europe and Hungary. The troops that entered northern Europe and France formed the first Polish army, and participated in the expeditions of the British and French allied forces to Norway and North Africa respectively. The troops that broke through Hungary were captured by the Soviet Union in the three Baltic countries. After Germany attacked the Soviet Union, the Soviet Union formed the Polish Second Army among these prisoners of war. Later, due to various differences, the troops went to the British colony to receive British armed forces and training.

Poland's military strength is completely incomparable with Germany's. The new tactics of "blitzkrieg" adopted by Germany made Poland completely unable to cope. The quality and equipment of the Polish army are inferior to those of the elite German army. In the face of powerful enemies, Poles made many wrong arrangements.